Gurobi 5.0.1 (linux64) logging started Fri Nov 16 18:00:23 2012 Optimize a model with 7920 rows, 12210 columns and 35530 nonzeros Presolve removed 250 rows and 3300 columns Presolve time: 0.16s Presolved: 7670 rows, 8910 columns, 31680 nonzeros Variable types: 0 continuous, 8910 integer (8910 binary) Found heuristic solution: objective 32.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: cutoff, 8052 iterations, 0.23 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 cutoff 0 3.00000 2.00000 33.3% - 0s Explored 0 nodes (8052 simplex iterations) in 0.40 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%